Reconstruction method of old cement concrete pavement

Abstract

The present invention is a kind of reconstruction method of the old cement concrete pavement. There are several methods for overhauling the old cement concrete pavement. The most commonly used method is to add asphalt mixture overlay on the road surface. The biggest defect of this method is that the asphalt cover The surface layer is prone to reflective cracks at the joints corresponding to the old pavement slabs. In order to overcome the defects of the reconstruction method of the old cement concrete pavement, the technical problem to be solved by the present invention is to provide a reconstruction method capable of overcoming the reflective cracks generated by the asphalt layer on the old cement concrete pavement. The transformation method of the present invention for solving the above-mentioned technical problems comprises the steps of: choosing to pave an asphalt layer on the old cement concrete pavement under a suitable temperature environment, then modifying the paved asphalt, and then during the paving process, paving the asphalt layer Layer thickness is controlled.

Description

【Technical field】 [0001] The invention relates to a reconstruction method of old cement concrete pavement, which comprises the step of paving an asphalt overlay layer at low temperature, the step of selecting the thickness of the overlay layer and the step of asphalt modification treatment. 【Background technique】 [0002] There are several methods for overhauling the old cement concrete pavement, but the most commonly used method is to add asphalt mixture overlay on the road surface. This method is not only simple and convenient, but also can effectively improve the performance of the old cement concrete pavement, and the construction period short, relatively low cost, and little impact on traffic and the environment; the pavement after reinforcement and repair involves a composite structure of rigid and flexible pavements. The most prominent advantage of this composite pavement structure is that its lower layer has high strength. The cement concrete road slab is used as the...

AI Technical Summary

Problems solved by technology

[0002] There are several methods for overhauling the old cement concrete pavement, but the most commonly used method is to add asphalt mixture overlay on the road surface. This method is not only simple and convenient, but also can effectively improve the performance of the old cement concrete pavement, and the construction period short, relatively low cost, and little impact on traffic and the environment; the pavement after reinforcement and repair involves a composite structure of rigid and flexible pavements. The most prominent advantage of this composite pavement structure is that its lower layer has high strength. The cement concrete road slab is used as the base layer, which can withstand large vehicle loads. The asphalt overlay layer on the upper layer can significantly improve the quality of the road surface, reduce noise and dust, prevent rutting, and enhance driving comfort and safety; The defect is that the material properties of the lower layer on the pavement are very different. The old cement concrete pavement is greatly affected by temperature changes, and there are cracks and joints on the old concrete slab, accompanied by phenomena such as staggered platform and void. Under the joint action of temperature and stress, the asphalt overlay is prone to reflective cracks at the joints corresponding to the old road slabs. Once the cracks penetrate the surface, it will cause slurry and water damage to the asphalt surface, causing further cracking of the asphalt surface. , greatly shorten the service performance and service life of the asphalt overlay